Meloseira] diatomace^e (Comber). 395 



Loan DA. — Among Oscillaria in wooden buckets partially or not 

 continually filled with water in gardens at Loanda ; in the country 

 garden of Sr. Dr. Mendes Alfonso ; 18 Oct. 1858. No. 127. Sediment 

 of Lemmi, and Chara from the Represa (pond) of Luis Gomez ; Feb. 

 1858. ' No. 281. No specimen. Sediment of Infusoria ; Represa de 

 Bemposta; 17 June 1858. No. 283. 



GoLUNCo Alto. — Yellowish-red slimy tufts, sometimes floating in 

 bubbly masses on the surface of ponds, sometimes submerged in com- 

 pany with Conferva ; remarkable for their metallic lustre in the dry 

 state ; only once observed, and then it was common in ponds in the 

 banks of the Quango river near Sange ; in Isidro's Varzea (marshy 

 meadow), July 1857. No. 133. With Conferva in rivulets near 

 Sange ; June 1856. No. 160. 



Benguella. — A green Alga, very gregarious, forming yellowish- 

 green scum-like strata over several miles of the ocean about a mile 

 from the coast. Welwitsch records that on the 22nd and 2.3rd of June 

 1800, the sea in the Bay of Benguella was for several miles parallel to 

 the coast covered with strata of this Alga ; and he hazards the sugges- 

 tion that it might perhaps have been carried down with the flood out 

 of the river Catumbella. No. 184- 



